Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

CRYSTAL CLARKIN PA
NPI 1356343958
Physician Assistant - Surgical in Hartford, CT

Active since August 12, 2005
114 WOODLAND ST, DEPT OF SURGERY, HARTFORD, CT 06105(860) 714-4694(860) 714-8096 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Female
  • Physician Assistant
  • Surgical

About CRYSTAL CLARKIN

This page provides the complete NPI Profile along with additional information for Crystal Clarkin, a provider established in Hartford, Connecticut with a medical specialization in Physician Assistant, focusing in surgical . The healthcare provider is registered in the NPI registry with number 1356343958 assigned on August 2005. The practitioner's primary taxonomy code is 363AS0400X with license number 000658 (CT). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1356343958
Provider Name
CRYSTAL CLARKIN PA
Gender
Female
Entity Type
Individual
Location Address
114 WOODLAND ST DEPT OF SURGERY HARTFORD, CT 06105
Location Phone
(860) 714-4694
Location Fax
(860) 714-8096
Mailing Address
1000 ASYLUM AVE SUITE 2109A HARTFORD, CT 06105
Mailing Phone
(860) 714-6581
Mailing Fax
(860) 714-8311
Is Sole Proprietor?
No
Enumeration Date
08-12-2005
Last Update Date
07-13-2026
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Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Physician Assistant Surgical

Taxonomy Code
363AS0400X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
000658
License State
CT

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NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1356343958, we treat the final digit (8) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
3
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
6
Unchanged
Pos 5
3
Doubled → 6
Pos 6
4
Unchanged
Pos 7
3
Doubled → 6
Pos 8
9
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
8
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 5 → 10 → 1 3 → 6 3 → 6 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 3 + 1 + 0 + 6 + 6 + 4 + 6 + 9 + 1 + 0 + 24 = 62

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1356343958.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine (Cardiovascular Disease)
114 WOODLAND ST
HARTFORD, CT 06105
Internal Medicine (Infectious Disease)
114 WOODLAND ST, INFECTIOUS
HARTFORD, CT 06105
Pediatrics (Neonatal-Perinatal Medicine)
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Pediatrics (Neonatal-Perinatal Medicine)
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Internal Medicine (Pulmonary Disease)
114 WOODLAND ST, PULMONARY
HARTFORD, CT 06105
Physician Assistant
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Physician Assistant
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Nurse Practitioner (Neonatal, Critical Care)
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Physician Assistant (Medical)
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Physician Assistant
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Physician Assistant (Surgical)
114 WOODLAND ST, DEPT OF SURGERY
HARTFORD, CT 06105
Physician Assistant
114 WOODLAND ST, PEDIATRICS DEPARTMENT
HARTFORD, CT 06105
Nurse Practitioner (Gerontology)
114 WOODLAND ST, DEPT OF GERIATRICS
HARTFORD, CT 06105
Physician Assistant
114 WOODLAND ST, NICU
HARTFORD, CT 06105
Physician Assistant (Surgical)
114 WOODLAND ST, DEPT OF SURGERY
HARTFORD, CT 06105
Physician Assistant (Surgical)
114 WOODLAND ST, DEPT OF SURGERY
HARTFORD, CT 06105
Physician Assistant (Surgical)
114 WOODLAND ST, DEPT OF SURGERY
HARTFORD, CT 06105
Physician Assistant (Surgical)
114 WOODLAND ST, DEPT OF SURGERY
HARTFORD, CT 06105
Radiology (Diagnostic Radiology)
114 WOODLAND ST, DEPARTMENT OF RADIOLOGY
HARTFORD, CT 06105
Radiology (Diagnostic Radiology)
114 WOODLAND ST, RADIOLOGY DEPARTMENT
HARTFORD, CT 06105

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1356343958, enumerated as an "individual" on August 12, 2005.

The provider is located at 114 WOODLAND ST DEPT OF SURGERY HARTFORD, CT 06105 and the phone number is (860) 714-4694.

Physician Assistant with taxonomy code 363AS0400X and a focus in Surgical.